Keystone XL protests from Houston to D.C.

May 13, 2015

Olivier Douliery/McClatchy-Tribune News Service

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A coalition of Native American groups and cattle ranchers -- the Cowboy and Indian Alliance -- take a horseback ride around the Mall in Washington, D.C. as a protest of the proposed construction of the Keystone XL pipeline, April 22, 2014. (Olivier Douliery/Abaca Press/MCT)

Olivier Douliery/McClatchy-Tribune News Service

4of136

A coalition of Native American groups and cattle ranchers -- the Cowboy and Indian Alliance -- take a horseback ride around the Mall in Washington, D.C. as a protest of the proposed construction of the Keystone XL pipeline, April 22, 2014. (Olivier Douliery/Abaca Press/MCT)